Using a sharp knife, cut peels off of oranges, leaving about a ¼ inch of the pith intact.
Eat the oranges.
Cut the peels into ¼ inch pieces.
Transfer peels to a large pot, cover with at least a ½ inch of cold water, and bring to a boil. Boil for 1-2 minutes. Discard water, and repeat this process 2 more times. This helps get rid of some of the bitterness of the peel.
Once you've boiled the peels 3 times, remove them from the pot and discard the water. Add 1 cup of water and 1 cup of sugar to pot. Cook until sugar has dissolved, then add peels back in. Bring to a boil, reduce heat, and cook for about 15 minutes, stirring occasionally.
Strain peels one last time and transfer them to a cookie sheet, strainer, or anything else so the extra sugar can drip off of them and they can dry out. The peels should be arranged so they are not touching, or they will stick together. Let peels dry for 4-8 hours. Feel free to sample while they are drying, but they will only get better with time.
Once they are dry, you can roll them in a little extra granulated sugar. Or, if you're feeling ambitious you can also melt chocolate and dip the peels for extra luxury.
Recipe by Things I Made Today at https://www.thingsimadetoday.com/2013/12/22/candied-orange-peels/